Cartridge fuse-plug



Q DAWSON AND E. E. MORGAN. CARIRIDGE FUSE PLUG.

' APPLICATION minim/4.19m.

Patented Sept. 2, 1919.

ittiint. A??? Iva/67230; OMZ'ZeS Daur 2g,

f lthe provision or a simple a efiicient fuse and. Enwnnn UNITED, STATES CHARLES DAWSON EDWLBED E.

PATENT OFFIOE.

MORGAN, F BELVIDEBE, ILLINOIS.

clm'rnmen ruse-PLUG.

. ven'ted certain new and useful Im rovements incartridgeFuse-Plugs, of winch the following is a s ion.

Our invention relates to cartridge fuse plugs; and theobject of our improvement is plug. fiu'ther object isthe provision'of a fuse plug which will utilize ordinary fuse wire such as comes in the market wound on spools and in which'no tools are'necessary for the adjustment of the'fu'se wire in the plug. A further object is the provision of a fuse plug in which the connection between the plugand its socket automatically binds the electrical connecting"v arts in the plug tightly together. Other 0 jects will appear I hereinafter.

Anembodiment of .our invention is shown in the accompanying drawing forming a part of this specification and in which Figure 1 is a side view with portions broken away to show underlying parts of our invention showing the same applied to a socket.

Fig. 2 is an enlarged perspective View of a cap used .in the construction; Fig. 3 is a perspective view of an electrical non-conducting member used in the fuse cartridge; and Y Fig. 4 is an end view of the member shown m Fig. 3. p Referring more particularly to the draw- 'ing, we have shown the representation of a socket 5 of the Edison base type in dotted lines in Fig. 1, althou h other forms of socket may be used if esircd. This form of socket is rovided with a recess in one side with a tireaded electrical conductor 6 around on. the wall of said recess; At the center of the conductor 6 and insulated from the latter is a conductor 7.

Our fuse plug comprises an electrical non-conducting body member 8 which may be of porcelain or any other desircd'substance. The member 8 isprovided with a bore 9 extending longitudinally in one end thereof and preferably throughout the greater part of its length. The inner end, marked 10 in Fig. 1, has threads formed on its periphery and on these threads is provided a thin annularsheet metal conductor flpccfllcation of Letters remit. Application filed n; 4, una' Serialll'o. aaasaa;

Patented Sept. 2, 1919.

'11. This conductor 11 is provided with threadsada ted to fit tightly on the threads 10 of. r 8. .The' connection between the conductor 11 and member 8 is such that when the plug is screwed in the conductor 6, the conductor will not be loosened or pulled off the end 10 of said member.

At one end of the conductor 11 is a narrow extension 12 which extends aldng the side of memberS and through a perforation 13 into and across the bottom of recess 9. The member 12 provides a connection between the inner end of the cartridge, described later, and the conductor 11.

In the bore 9 we provide a fusecartridge which preferably comprises an electrical non-conducting member 14 which may be of fiber orany other desired substance. The member 14 is preferably of a cross section correspondin to the cross section of bore 9.

and provid with a groove 15 which extends'abross the end 16 and along one side of said member with the other end of the groove extending across the end 17 of said member and terminating in a longitudinal recess 18 in the end 17 of the member 14.

The groove 15 and recess 18 are preferably.

formed in diameters so that fuse wires of desired diameters will substantially fill such recess and groove, and so that the caps 19 and 20 will form electrical contact with the end portions of the fuse wire 21. In fitting a fuse wire to the member 14, one end 22 is inserted in the recess 18 and-the fuse wire then bent and pressed into the groove 15 with the end 23 of'the fuse wire terminating in the end of the groove 15 substantially as indicated in Fig. 1. The fuse wire being of a soft material, itmay easily be broken oil or even out with the thumb nail at the end 23. After the fuse wire is brought to this position, caps 19' and 20 are slipped onto'the ends of member 14 and over the end portions of the fuse wire 21. The arrangement of the parts is such that when the member 8 has its member 11 adjusted into the member 6 of the receptacle, that the connection between the members 6 and 11 will force the caps 19 flange 24 so that when the fuse plug is taken caps engaging the sides of saidrecess lockout of the socket 5. a thumb nail may be ining the fuse cartridge in said recess.

neltcd undcnthe flange 21 to dull the fuse 3. In combination, a use plug bodv havcartridge out of the recess 9. he flange 2-1 cap 19, or not all the way aroun'd if desired. of said recedsi ii vfuse cartridge member dislhc caps 19 and'20 are )referablv formed posed in said recess; a fuse wire in said ear Q b a I m tlttlmt'ttlfi so that the use cartridge-will tri-dge member: acap on each end of said slide easily in the P011053 9. To prevent the cartridgm member in electrical connection fllso cart-ridge becomiag misplaced in the with said fuse wire,'one-of said caps being recess 9 when the plug is not in the recepin engageiilentwitll said electrical conductor tacle 5, we provide friction'meaus on'the and the .otheriot' aaidrups extending slightly fuse cartridge for holding the'latter infthe from said recess; and spring armswhi the recess 2|. ln the furor-shown we lnire pr cap whichfextemls from d id vided spring arms 25 on the edgejof cap 191' arms engaging the sides of said recess and a which engage the walls of the recess 9 to holding. illutfttl'il'ltlilt! member, fuse wirea nd {rictio nally lock the fiiaeca'rtridge in such. caps in said recess. I

o {.Ju eomhination'a fusecartridge comp ing recess therein; an electrical conductor may extend entirely around the base of the having a portion (llh'lIUt-vttl at the inner end c In the side of the member 14 we pie fer prising an elongated electrical non-conductablj' cutaway a part of said member being' member baring a. groove extending een the caps 19 and :20 to a depth deeper acct-Isa one end, along one side. and to the thanthe groove 15 so that; there IS an air nnddle ot the other end of said member,

vspace iitiarouud the fuse wire il between' "there jb'eing a recessmxtending longitudisaid caps, v v nully in the last-mentioned end of said mem- Itwdl'be apparent that when the fuse wire is burntoutin use, upon:unacrewing -fu.-'e wire having one end extending into the fling So from the wicket: the fuse carsaid recess and its other part lying iii said c tridge may be easily slipped out ofthe recess groove; and caps-on the ends of said mem-- tricul non-ranulucting member with a fuse wlreextelnlmg along one. side ol said mem-- 9 and the caps 11 and 20 removed from the her clamping the fuse wire to the end per member 14 and a new )ieCe of fuse .wire,- tiousof such member. taken from a spool or however it may be sold ont'he marld-t, inserted in the'recess 18 prising an elongated electrical non-conductand grmwc 15 as before described-mid the mg member having "a groove extending caps It! and '20 put back on the ends of memacross one end,- along one side and to the ber' 14. the fuse plug insertedin the recess 9 ,|niddic' of the other end of said member, again and the lug adjusted hack in the re there being .a recessextending longitudiceptacle' nally in the last-'inentioned end of said memii'e claim: her at the end of said groove in Such end; 1. In combination, a fuse.- )lug having a a fuse wire having oneend extending into recess extending in one end t iereof; a eonsaid recess and its other part lying in said doctor on the outer side of said fuse plug "more; and caps on the ends of said memhaving a portion extending into said recess ier clamping the fuse wire to the end porat the inner end of the latte-ran fdae eartions of said na-mber, there being a, recess in tridge in said recess and made up of an elccthe side of said member between said caps trieal non-conducting member with a fuse deeper tlaursaid grmn'e prov-idin' an 'air wire. extending along one side of said memspace around the portion of the use wire her and a. cup on eachend of said member in between saidcaps. electrical connection with said fuse wire; ,6. In comb'nation, a fuse plug body havauda resilientarm attached to the fuse earing a recess. therein; a fuse cartridge memtridge, tllhptlstul between saidcaps and fric-J beidisposed in said recess; a fusewire in tionally engaging the side of said recess.

'2. in combination, a'fnse dug having a end of said fuse cartridge membenin el'ee recess extending in one end thereof; a, contrical connection with said fuse wire; and doctor on the outer side. of said fuse plug resilient arms on one-of said caps engaging having a portion extending into'said recess. the sides ofsaid recess and locking said fnse':

her at the end of'said groove in such 'endya aa'hl tune. cartridge member; a cap on each at the inner end of the latter; a use carvcaiftridge member, fuse wire and caps in the reruns-of said body. lntest-imony whereof wehave signed our names to this specification on this'30tl1 day her and a cup on'eiurh'ond of said member of April, A. l). 1918. and having electrical conmsetiou with said lHARLES DAWSON. fuse. who; and rmilienbarms on one of said IDWARD E. MORGAN.

tridge in said recess and made up oliau clue-'- 

